Design of an Ultra-Wideband, Low-Noise Amplifier Using a Single Transistor: A Typical Application Example

Abstract

Abstract-In this work, a design method of an Ultra-Wideband (UWB), low-noise amplifier (LNA) is proposed exerting the performance limitations of a single high-quality discrete transistor. For this purpose, the compatible (Noise F , Input VSWR V i , Gain G T ) triplets and their (Z S , Z L ) terminations of a microwave transistor are exploited for the feasible design target space with the minimum noise F min (f ), maximum gain G T max (f ) and a low input VSWR V i over the available bandwidth B. This multi-objective design procedure is reduced into syntheses of the Darlington equivalences of the Z Sopt (f ), Z L max (f ) terminations with the Unit-elements and short-circuited stubs in the T -, L-, Π-configurations and Particle Swarm Intelligence is successfully implemented as a comparatively simple and efficient optimization tool into both verification of the design target space and the design process of the input and output matching circuits. A typical design example is given with its challenging performance in the simple Π-and Π-configurations realizable by the microstrip line technology. Furthermore the performances of the synthesized amplifiers are compared using an analysis programme in MATLAB code and a microwave system simulator and verified to agree with each other.

A D-Band Power Amplifier With 30-GHZ Bandwidth and 4.5-DBM Psat for High-Speed Communication System

“…So it is suitable for using as signal trace and matching network. In order to achieve enough power gain and maximum output power at same time, the different matching strategies are used in input and output matching network design [28][29][30]. The conjugate matching method is adopted in input matching network design to achieve the maximum power gain, while the power matching method is adopted in output matching network design to obtain the maximum output power.…”

Theoretical Study of Microwave Transistor Amplifier Design in the Conjugately Characteristic-Impedance Transmission Line (Ccitl) System Using a Bilinear Transformation Approach

“…Some of these have already been employed for practical applications, while some novel ones have been modeled and fabricated; i.e., metamaterial TLs possessing negative refractive index and permeability [12][13][14][15][16][17]. Although the tremendous increase in wideband amplifiers has dramatically shifted the design methodology to focus more on the macro framework of wideband operation [18,19], component selection and integration [20][21][22] are still viable approaches that can greatly improve the overall performance of amplifiers.…”

Area and Power Optimization of 802.15.4A Uwb Pulse Low Noise Amplifiers by Genetic Algorithms

“…Several goals are attempted as shown in Table 1. Other authors used numerical optimizations for UWB LNA amplifier design with good results [9]. The main goal is not the S 11 or S 21 , rather, the performance is the measure of the distortion of the reference pulse, as discussed in Section 4.…”